Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/16026#discussion_r89713119
--- Diff:
sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/FilterPushdownSuite.scala
---
@@ -514,6 +514,39 @@ class FilterPushdownSuite extends PlanTest {
comparePlans(optimized,
analysis.EliminateSubqueryAliases(correctAnswer))
}
+ test("joins: push down where clause into left anti join") {
+ val x = testRelation.subquery('x)
+ val y = testRelation.subquery('y)
+ val originalQuery =
+ x.join(y, LeftAnti, Some("x.b".attr === "y.b".attr))
+ .where("x.a".attr > 10)
+ .analyze
+ val optimized = Optimize.execute(originalQuery)
+ val correctAnswer =
+ x.where("x.a".attr > 10)
+ .join(y, LeftAnti, Some("x.b".attr === "y.b".attr))
+ .analyze
+ comparePlans(optimized,
analysis.EliminateSubqueryAliases(correctAnswer))
+ }
+
+ test("joins: only push down to the right of a left anti join") {
--- End diff --
How about `joins: only push down join conditions to the right of a left
anti join`?
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